Will be spending the night in Kingston this summer. I have read most of the other threads and like some of the suggestions. But was also looking for some more. I'll have 2 kids in tow, 6 months and 3 years and have no idea what they will be like after a day full of amusement parks, so a sit down is out. Any good take-out sandwhiches (hot or cold), burgers, BBQ???
It seems that burgers are taking over Princess Street these days! If you are up for a burger, Harper's Burger Bar on Princess Street might be a good option. They sell a wide variety of burgers, many of them "upscale" but enough of a "regular" nature to satisfy the kids if the 3 year old wants to snack off your plate. They sell great milkshakes, too.
They are happy to take phone orders and take out is perfect. They are very centrally located, too.
Enjoy your time in Kingston!